Bag-tier shears.



J. ROGERS. BAG TIER SHEABS. APPLIOATION FILED NOV. 2, 1907.

Patented Sept. 29, 1908.

wing/55 1W2 NORRIS PETERS cm. wisuhqs-mn, u. 'c.

UNITED s ATEs PATENT OFFICE.

JOHN ROGERS, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-HALF TO GUSTAV E. KAPPLER AND BAG-TIER SHIEARS.

Specification of Letters Patent.

Patented Sept. 29, 1908.

Application filed November 2, 1907. Serial No. 400,337.

To all whom it may concern:

Be it known that I, JOHN ROGERs, a citi' zen ofthe United States, residing at Cleveland, in, the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Bag-Tier Shears, of which the following isa specification.

This invention relates to mechanism for tying a bag, and particularly to means for severing a cord, after a portion of said cord has been wrapped and tied upon the gathered neck of a bag. Its object is to provide a durable and efiective mechanism, 0 erative in conjunction with abag tying mac ine, for positively cutting off the cord which said machine wraps and ties upon the gathered neck of a bag. 1

A further object is to adapt cord-shearing mechanism to the type of bag tier shown and described in my application for patent filed June 20, 1907, and serially numbered 379,868.

To these ends my invention consists in'the features and combinations hereinafter described and claimed, a structural arrangement thereof being illustrated in the accompanying drawings in which Figure I is a plan view, and Fig. II is a .front elevation of the essential parts of a bag tying mechanism, showing my im roved cord-shearing arrangement. Fig. I rear elevation of the shearing mechanism, certain arts being in section on line IIIIII of Fig. Fig. IV is a detailed plan view with the longer shear blade in section on line IVIV of Fig. III.

The construction and operation of the tier, by which a knot such as shown in Fig. III is formed, is fully described in my above men tioned ap lication serially numbered 379,868, but in or er that my present improvements may be comprehended, I will first proceed with a brief description of the tier, employing the same reference characters as are used in the aforesaid application.

The superimposed plate 77 upon theplate 76 forms a slidable boX-frame w for the tier mechanism, which has a recess 78 in which a rotary shuttle 9c is mounted, the latter having gear teeth about its periphery whereby it is driven as re uired in the direction of the arrow in Fig. by the driving shaft 84 through the large gear wheel 85, and the intermediate pinions 92 and 93. A gap 79 in said shuttle is a is arranged'to register with the recess 78, to receive the gathered neck I) of a bag.

A cord 130 is first threaded through a tension device 129 secured to the tier frame, and then through an eye in the forward end of an eye-bar z, the latter being universally pivoted to the frame at 103, and its rearward end guided in an elliptical guide 105. A cam wheel y has spur gear teeth and is driven by a pinion 86 on the shaft 84. A lever 109 rotatably mounted on the shaft 84 engages in the groove 107 in the wheel y at one end, and operates the eye-bar 2 through a link 11 l hinged between its other end and an arm 112 operatively connected to the eye-bar.

A cord clamping dog 81 is pivoted upon the shuttle w, and adapted to spring against a lug 80 upon said shuttle, so as to catch and hold the end of the cord 130. Said cord clamp is opened at ro er times by the cam levers 97 and 101, ot of which levers are operated'by certain rojections on the wheel y engaging the re easing lever 94 against a spring, not shown, and thereby reciprocating the connecting bar 99, one end of the latter being hinged to the lever 97 and a pin thereon engaging the tail of the lever 101, as.

shown in Fig. I. Thus, the shuttle ac starts from the position shown in the figures, the clamp 81 is opened to receive the free end of the cord and then closed thereon, whereby the cord is wrapped twice or thrice about the bag-neck, and is released from said clamp by the lever 97, the latter being swung inward after the last wrap is made. Meanwhile a lateral loop 118, on the end of a rotatable shaft 115, and terminating in a hook, is in position to receive. the wraps of the cord as the shuttle carries the latter around the bagneck. When the last wrap has been drawn into said loop 118, the end of the eye-bar z is forced by the cam 108 to describe an elliptical movement about the hooked end of the loop 118, which throws a bight of the cord 130 into said hook. The rack cam 125 on the wheel y then engages the pin 126 on the slidable rack 121, which forces the latter backward, thereby rotating the shaft 115 throu h its pinion 120 in mesh with said rack. This l atter movement serves to rotate the loop 1 18, and its hooked end carries the aforesaid bight of cord upward between the wraps and the bag-neck, and then rearward therefrom, sothat a knot is formed as shownin projecting lug of the shorter blade g.

Fig. III. In this position it is necessary to release the end of the cord from the clamp 81, and at the same time sever it at a point between the eye-bar z and the hooked end of 118, after which the hook shaft 115 is returned to its normal position by the spring 124, and the shuttle as continues its rotation to the position shown. With this eX lanation of the original machine, the fol owing description of my improved cord severing mechanism should be readily comprehended.

An approximately horizontal bar a of rectangular section is supported above the inner side of the central aperture of the shuttle m upon the standards a and d secured to the tier frame to. The bar a and standard 0 may be integral, or both standards may be integral with the bar if desired, but herein they are shown bolted together. A long shear blade f is vertically disposed above the loop 118, and adapted to reciprocate in suitable guides upon the bar 0.. As shown in Figs. III and IV, a recess is made in the bar a to guide said shear blade, but it is obvious that other well known means may be provided for this purpose. A short shear blade g is fulcrumed uponthe blade f by the pin 6 secured to the latter blade near its lower end, so that the cutting edges of said blades are opposed to each other. The shear blades are kept in place by a plate h secured to the bar a, as shown. Another plate is is secured to and depends from the bar a, and has a recess 1' in its inner side adapted to receive a laterally A light spring I is attached at one end to the blade f, being bent upon itself so that its other end rests upon the bar a, as shown.

A bell-crank lever m has its vertical arm fulcrumed to the bar a by a pin a, and the swinging end of its horizontal arm is slotted to receive a.pin 0 rojecting from the blade f. A horizontal ang e lever 19 is fulcrumed at g to the frame structure ofthe tier w, and its rearward end is provided with a pin 1" proj ecting downward into the groove 107 of the wheel 1;. A plain link 8 connects the forward end of the lever 10 to the horizontal wing of an angle link i, the vertical wing of the latter being operatively connected by the bolt 11. to the depending end of the lever m.

The shearing mechanism is held out of operation While the pin 1" is engaging in the circular portion of the groove 107 and during this interval the shear blades are held up above the cord, and are also opened because the lug is in contact with the upper end of the recess 1). The cord 130, which is led over the bar a, is free during this interval from pressure by the spring Z. But, the knot having been formed by the bight of cord '0, Fig. III, being pulled up under the wrapsand away from the bag neck I) by the hooked loop 118, as hereinbefore described, the shearing device operates quickly to sever the cord at 'Z). The cam 108 011 the wheel '3/ strikes the pin 1", thereby swinging the lever p, which through its connections 8 and 1, swings the lever m to force down the shear blades. When the cutting edges of the shear blades have straddled the cord, the lug engages the lower end of the recess i, and as the blades are further depressed they are thereby forced to close and cut oil the cord at the bight 1). At the same time, the spring Z clamps the cord upon the bar a, so that said cord, which is under tension, cannot spring back through the eye in the bar 2 when it is severed. The various parts are returned to their first position of rest immediately after the severing of the cord, and, the tier w is carried backward away from the bag. Thus it is evident that the cord severing portion of the bag tying mechanism, as described herein, has been made positive and effective in its operation, and as durable as shear blades are known to be.

I further point out and distinctly claim as my invention 1. The combination with mechanism. for wrapping and tying a cord into a knot upon a bag-neck, of shear blades operative in con.- junction with said mechanism and arranged to sever said cord after the latter has been tied and drawn. into a knot, substantially as set forth.

2. The combination with mechanism for wrapping and tying a knot in a continuous cord upon a bag-neck, of a shearing device operative by said. mechanism for severing said cord from the bag tie after the latter has been drawn into a knot, and clamping means adapted to hold said cord while it is being severed from the bag tie, substantially as set forth.

3. The combination with mechanism for tying a bag, of a slidably mounted shear blade, means operative by said. mechanism for reciprocating said blade, at corresponding shear blade fulcrumed to said slidable blade,

and means for swinging said fulcrumed blade, substantially as set forth.

4. The combination with mechanism for tying a bag, of a shear blade slidably mounted thereon, means operative by said mechanism for reciprocating said blade, a shear blade fulcrumed to said slidable blade hav- -ing a lateral projection, and means adapted a cord comprising a rotary shuttle, a rotatable hook and a vibratile eye-bar, of a cam wheel operative in conjunction with said mechanism, a pivoted lever engaging said cam wheel, a pair of shears adapted to sever said cord, and operative connections between said lever and said shears, substantially as set forth.

7. In a bag tying machine, the combination with mechanism for wrapping and tying a cord comprising a rotary shuttle, a rotatable hook and a vibratile eye-bar, of a cam wheel operative in conjunction with said mechanism, a pivoted lever engaging said cam wheel, a pair of shears adapted to sever 15 said cord, a lever connected tosaid shears, and operative connections between the said levers, substantially as set forth.

In testimony whereof I affix my signature in the presence of two subscribing witnesses g, at Cleveland, Ohio, this 29th day of October,

JOHN ROGERS. Witnesses:

F. W. RANGIN,

R. B. HOPPER. 

